The Venona project was a counter-intelligence program initiated by the United States Army Signal Intelligence Service (a forerunner of the National Security Agency) that lasted from 1943 to 1980. The program decrypted messages sent by Soviet Union intelligence agencies, including its foreign intelligence service and military intelligence services. The project produced some of the most important breakthroughs for western counter-intelligence, including the discovery of the Cambridge spy ring and the exposure of Soviet espionage targeting the Manhattan Project. The project was one of the most sensitive secrets of United States intelligence; it remained secret for over a decade after it ended and was not declassified until 1995.
PART OFNational Security Agency (NSA) Archive
National Security Internet Archive (NSIA)
2,690National Security Agency
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